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H. D. SNOW. Governor for Water-Wheels, 8L0.

No. 228,566. Patented June 8,1880;

N. PETERS. PHOTO-LITHOGRAPHER. WASHINGTON, D.

llNiTED STATES PATENT hrice.

HERVEY D. SNOW, OF WATERFORD, ASSIGN OR TO ROBERT JOHNSTON, OF OOHOES,NEW YORK.

GOVERNOR FOR WATER-WHEELS, 84c.

SPECIFICATION forming part of Letters Patent No. 228,566, dated June 8,1880,

Application filed Sept-ember 22, 1879.

To all whom it may concern:

Be it known that I, HERVEY D. SNOW, of \Vater-iord, in the county ofSaratoga and State of New York, have invented an Improvement inGovernors for Water-WVheels, 850., of which the following is a correctspecification.

In the regulators for water-wheels, steam-engines, &c., the governor isrequired to open the gate or valve wider when the speed slackens, and topartially close the same when the speed increases. With water-wheelsespecially a difficulty arises from the fact that the opening of thegate is slower in proportion than the closing, because when themachinery is running at the average speed the lessening of resistance tothe power allows the momentum to increase and act rapidly upon thegate-moving screw or other device, and the gate is moved more quickly inclosing thanit would be if the speed of the motor decreased below thestandard speed; hence it takes a longer time to recover the normal speedfrom a less speed than it does to restore the normal speed from a higherspeed.

My present invention relates to the combination of governors and camswith the valve or gate-actuating mechanism, whereby said mechanism willbe rendered more rapid in its operation when the speed lessens below theaverage than when the speed increases above the average, therebybringing the motor back to the normal speed from a higher or lower speedwith uniformity.

In operating the gates of water-wheels the mechanism may continue toturn the screw or stem after the gate has been moved to its extremepoint in opening or closing, and in so doing injure some of the parts.This mayarise when the circumstances of resistance are unusual and theregulating device does not become fully effective in bringing the speedof the motor to its normal condition.

I combine with the device that actuates the stem of the gate afriction-clutch between the stem and its motor so that the motor canturn the screw; but when the resistance to the movement of the gatebecomes too great the friction-clutch will yield and prevent injury tothe parts.

In the drawings, Figure 1 is an elevation of the gate-actuatingmechanism and section of the governor-standard, and Fig. 2 representsthe screw-shaft for the gate partly broken open, and shows thefriction-clutch.

The governor balls or weights to c are of any desired character. Theyare pivoted. at bin the yoke 0 upon the tubular shaft (1, to which arevolving motion is given by bevel-gearing or otherwise.

The shaft 61 is supported by the standard 6 and frame f, and through thetubular shaft (1 the rod h passes. At the upper end of this rod h thereis a jaw, against which the governor-cams act, and this jaw may alsohold the rollers i to lessen friction.

The governor balls or weights are provided with segmental bars thatextend laterally from the arms, and the lower edges of these form camsI, that are above the rollers i, and such cams slide adjacent to eachother as the goveruor-balls move. The portions 2 of the canr faces aremore rapid curves than the portions 3.

The portions4=of the cams rest upon the rollers i when the governor isrevolving at the required speed. If the speed increases so as to movethe governor-balls, say, ten degrees, the end motion given to the rod Itwill be less than the end motion of it that would result from the speeddecreasing and the governor-balls falling ten degrees. By thus varyingthe movement given to the rod h by the cams the governor valve or gatethat receives its motion direetly or indirectly from the rod It will bemoved in such a manner that the speed will be increased from too slowaspeed to the average as quickly as it will be reduced from too high aspeed to the average.

I have shown my improvement as applied with the water-wheel regulatorsimilar to that patented by me July 14, 1868, No. 7 9,870.

The pawls s 8 stand in opposite directions above the toothed wheel a.The pivots of these that has its fulcrum at 7, and the shorter end ofthis lever is below the rod h, and the upper end of his kept in contactwith the cams'lby the said weighted lever t, and hence as thegovernor-balls rise or fall the rod h, weighted lever, and thepawl-lifter all move together and bring the pawl 8! into action if thespeed becomes too low, and the pawl 8 into action if the speed is toohigh,-so as to restore the motor to its normal speed with regularity anduniformity.

Between the shaft 1) and the shaft t of the gate-regulating screw thereare the bevel-gears o and w and the gear '1) is secured to the shaft 19by a friction-clutch, the same being formed by the divided hub of saidwheel bolted together by the screws .10, so as to clamp the shaft withgreater or less force. If the gate is moved to the extreme point in.either direction, this friction-clutch allows the gear to to remainstationary, while the shaft 12 may still be moved by the pawls, thuspreventing injury to the parts.

I am aware that governor-ball arms have been provided with cam-leversacting on toggle-bars. In my governor the cam acts directly upon thevertical rod, and the cam is shaped so as to act in the mannerdescribed.

I am also aware that the connections in governors have been made byfriction-clutches acted upon by levers to increase or decrease friction.'In my apparatus the friction is uni form, and serves to insure themovement of the parts except when the limit of motion is reached.

I claim as my invention 1. The combination, in a governor, of theweights a, pivoted at b, the segment-bars extending laterally from thearms of the governor-balls, and having'on their under side the cams l,the faces of which are curved in the manner and for the purposes setforth, the rod h, having a jaw provided with a friction-roller,

41, at its upper end,against which the cams act. the lever t, forraising the rod h into contact with the cams, and means for revolvingthe governor, substantially as set forth.

2. In a water-wheel regulator, the combination, with the mechanism forraising or lowering the gate, of a frictional clamp at the hub of thegear-wheel, for connecting the same to the shaft, all constructed andarranged as and for the purposes set forth.

Signed by me this 17th day of September, 1879.

HERVEY D. SNOW.

' Witnesses:

JOHN HIGGINS, GEORGE H. COLE.

